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发明名称
摘要
申请公布号
JPS56138422(U)
申请公布日期
1981.10.20
申请号
JP19800037004U
申请日期
1980.03.21
申请人
发明人
分类号
G04G9/00;G04G21/00;G04G99/00;H01H9/04;H01H9/06;(IPC1-7):H01H9/06
主分类号
G04G9/00
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代理人
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